YXU - SFO

$330 Find Cheap Flights from London to San Francisco

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to San Francisco departing on 3/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags

Search hundreds of travel sites at once for deals on flights to San Francisco

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to San Francisco, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to San Francisco, as well as popular online travel agencies
In the last 7 days travelers have searched 46,646,933 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

World’s Best Airfare Search Site for 2024

Cheap Flight Deals from London to San Francisco (YXU-SFO)

 
These are the cheapest deals for flights from London to San Francisco currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from London to San Francisco

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from London to San Francisco.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
3:25 pm - 9:42 pmYXU-SFO
9h 17m1 stop
10:45 pm - 9:15 amSFO-YXU
7h 30m1 stop
Wed, Mar 19 - Mon, Mar 24
5:45 am - 10:52 amYXU-SFO
8h 07m1 stop
10:36 pm - 2:50 pmSFO-YXU
13h 14m2 stops
$340United Airlines
Find Deal
Wed, Mar 19 - Mon, Mar 24
3:25 pm - 12:30 amYXU-SFO
12h 05m2 stops
10:36 pm - 2:50 pmSFO-YXU
13h 14m2 stops
$346United Airlines
Find Deal
Wed, Mar 19 - Mon, Mar 24
9:55 am - 12:56 amYXU-SFO
18h 01m2 stops
11:59 pm - 2:50 pmSFO-YXU
11h 51m2 stops
$643United Airlines
Find Deal
Sat, Jan 4 - Sat, Jan 11
9:55 am - 3:26 pmYXU-SFO
8h 31m1 stop
8:25 am - 8:20 pmSFO-YXU
8h 55m1 stop
$1,358United Airlines
Find Deal
Sat, Jan 4 - Sat, Jan 11

Flights from London to San Francisco - Travel Insights & Trends

Get data-powered insights and trends into flights from London to San Francisco to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from London to San Francisco?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from London to San Francisco, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from London to San Francisco is April, where tickets cost $315 on average. On the other hand, the most expensive months are December and March, where the average cost of tickets is $764 and $570 respectively.

Good to know

Low season

October

High season

July

Cheapest flight

$330
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from London to San Francisco

When to book flights from London to San Francisco

Are your dates flexible? Find out the best times to travel from London to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from London to San Francisco

  • What is the cheapest flight from London to San Francisco?

    In the last 3 days, the lowest price for a flight from London to San Francisco was $330 for a round-trip ticket.

  • Do I need a passport to fly between London and San Francisco?

    A passport is required to fly from London to San Francisco.

  • Which aircraft models fly most regularly from London to San Francisco?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London to San Francisco?

    Star Alliance is the only airline alliance operating flights between London and San Francisco.

  • How does KAYAK find such low prices on flights from London to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from London is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to London with another airline. Booking your flights between London and SFO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Book cheap flights from London to San Francisco

One-way flight deals

multi-stopMultiple Airlines
2180 miYXU-SFO

Search by stops

Everything you need to know for your flight from London to San Francisco

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.